Effects of detraining on performance measures following cycling with or without blood flow restriction
Young, Kaelin C.
Fahs, Christopher A.
Rossow, Lindy M.
Loenneke, Jeremy P.
Thiebaud, Robert S.
Bemben, Debra A.
Bemben, Michael G.
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Kim, Daeyeol; Singh, Harshvardhan; Young, Kaelin C.; Fahs, Christopher A.; Rossow, Lindy M.; Loenneke, Jeremy P.; Thiebaud, Robert S.; Kim, Eonho; Ye, Xin; Bemben, Debra A.; Bemben, Michael G. 2013. Effects of detraining on performance measures following cycling with or without blood flow restriction. Medicine and Science in Sports and Exercise, vol. 45:no. 5:pp 616-616:Supplement: 1 Meeting Abstract: 2627
Generally, cycle training improves muscular strength, body composition, and aerobic capacity; however, once the training stimulus is removed (detraining), many of the adaptations become partially or entirely diminished.PURPOSE: To compare the effects of three weeks of detraining following six weeks of either traditional high-intensity cycle training (HI) or low-intensity cycle training with blood flow restriction (LI) on body composition, muscle hypertrophy, muscle strength, and aerobic capacity.METHODS: Subjects (31 males, 18-30 yrs) were assigned to one of three groups: HI (n=10, 60–70% Heart Rate Reserve (HRR)); LI (n=11, 30% HRR with blood flow restriction (BFR) at 160–180 mmHg); and CON (n=10, no exercise). Subjects in HI and LI exercised three sessions (5 min warm-up & 20 min cycling)/week for six weeks. Body composition (fat %, total fat mass, and total lean mass by DXA), muscle hypertrophy (leg fat and lean mass by DXA, and muscle CSA by pQCT), muscle strength (1-RM leg extension and flexion), and aerobic capacity (VO2max) were measured immediately after six weeks of training and again three weeks later (detraining). A two-way repeated measure ANOVA was utilized to compare groups and times with statistical significance set at p<0.05.RESULTS: There were no significant differences between groups and times for any of the outcome variables. The % changes are calculated and a number of trends were noted. Fat %, fat mass, and lean mass changed by 2.0%, 2.2%, and -0.3% in LI, 2.3%, 2.4%, and -0.5% in HI, and -2.2%, -2.5%, and 0.6%, respectively in CON. Percent changes in muscle CSA were 0.67% in HI, -0.25% in LI and 0.16% in CON, respectively. Additionally, leg Lean mass increased by 1.5% in LI, but only -1.0% in HI and -1.0% in CON. Percent changes for leg extension and flexion strength were 2.8% and 0.2% in HI, -0.4% and 1.6% in LI, respectively. Finally, percent change in VO2max were 1.5% in HI, -3.8% in LI, and -1.4% in CON.CONCLUSIONS: Performance measures were basically maintained after three weeks of detraining indicating that the physiological adaptations from both high-intensity (60-70% HRR) and low-intensity (30% HRR) cycle training with BFR persist for at least three weeks post training.
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